What are they busy 后用加doing吗?（Wat are they busy doing?)

What are they busy 后用加doing吗?（Wat are they busy doing?) -What are you busy doing for?-For the final exams.They are _ What are they doing? what are they doing the doctors are busy doing what they can to save dying man,这 The doctors are busy doing what they can _____ the dying man what are they doing now? They are--- 英语what are they doing what are they doing?急用! what are you doing now?They are--- A:Hello,Mr.Green.What are busy doing? what are they doing?they are leaving shanghai__________beiji